我正在尝试用 C 开发一个小型聊天服务器。
对于一个简单的聊天服务器，
- （传输端点）===（套接字）？
- 我必须为每个客户端使用一个套接字，还是可以为多个客户端重复使用一个套接字？如果是这样，如何？
- 有这样做的标准方法吗？
- 有什么好的参考资料吗？
我可以看到一些示例实现吗？我必须使用 gcc 编译器和 c 语言来完成这项任务。
问问题
19751 次
2 回答
4
You need one socket/client and no, you cannot reuse sockets. If you have to handle multiple clients you can:
- create one thread per client and use blocking I/O (preferably with timeout).
- create single threaded program and use demultiplexing with select/poll/epoll/kqueue and use non-blocking I/O.
- use asynchronous I/O.
For C socket communication examples The Unix Network Programming book is probably the best source. It has ample of example programs and explanation.
于 2011-08-21T19:24:50.957 回答
2
- ( Transport endpoint ) === ( socket ) ?
NO. "Endpoint" means IP address with Port number. Socket presents one "Session" and session consists of two endpoints, local endpoint(IP, port) and remote endpoint(IP, port).
- Do i have to use one socket per client, or can I reuse a socket for multiple clients ? If so, how ?
One socket per one session. That means a server needs to create a new socket for each remote endpoint( client ). You can reuse socket when it's not in use anymore. Look for SO_REUSEADDR socket option.
- Is there a standard way of doing this ?
Not sure what you are asking. A standard way for chat service or for server/client model? For chat service, look for IRC. Server/Client programming model is well documented. You can Google it.
- Any good references available ?
Now I believe you understand what the error message means.
于 2011-08-21T19:29:27.350 回答